There are good features and there are bad ones. If true, Apple is using planned obsolescence features in its iPhones since 2008:
http://www.nzherald.co.nz/business/news/article.cfm?c_id=3&objectid=11963122
Apple explains the "feature":
https://www.theverge.com/2017/12/20/16800058/apple-iphone-slow-fix-battery-life-capacity
Quoting:
""I believe, as do others, that Apple introduced a change to limit performance when battery condition decreases past a certain point.
"If the performance drop is due to the 'sudden shutdown' fix, users will experience reduced performance without notification.
"Users expect either full performance, or reduced performance with a notification that their phone is in low-power mode.
"This fix creates a third, unexpected state."
Without this warning Poole believes that the fix will cause users to believe their phone is slow so they should replace it, rather than the battery which is actually at fault.
"This will likely feed into the 'planned obsolescence' narrative," he added.
Every time Apple launches a new handset people seemingly flock to Google to ask why their current iPhone or iOS is slow.
This trend has been seen every year since Apple released the iPhone 3G in 2008.
Explanations for the slowness range from Apple's iOS causing problems on older devices to the firm deliberately slowing down old phones to make people buy the new handsets.
This latter explanation is known as planned, or built-in, obsolescence.
This is the idea that manufacturer's deliberately make their products in such a way that they become out-of-date sooner.
By doing this, the companies can encourage customers to buy the latest model of a certain product."
Updated: 2017-12-08, Apple "explains".
